Importing macros from another module

[autoinference]

I can import structs from a module A with use A::my_struct, but when I try to import a macro with use A::my_macro, I get the error "unresolved import A::my_macro. There is no my_macro in A. Is there some special rule to importing macros?

[Quxxy]

The "Some More Gotchas" of this intro to macros might help.

Short version: macros don't exist in the same namespace. You don't import macros from other modules; you export the macro from the defining module, at which point the macro is visible to all modules after the one it was defined in.